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.018 Washington State Energy Code—Residential <br /> Prescriptive Energy Code Compliance for All Climate Zones in Washington <br /> Single Family;-New&Additions(effective February 1,211j <br /> I Table 406.3—Energy Credits(Single Family) i <br /> j Option Description j Credits::Sf. j <br /> 2.AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION OPTIONS <br /> Only one option from Items 2.1 through 2.4 may be selected in this category. <br /> Compliance based on R402.4.1.2:Reduce the tested air leakage to 3.0 air changes per hour <br /> maximum at 50 Pascals or I <br /> For R-2 Occupancies,optional compliance based on Section R402.4.1.2: Reduce the tested <br /> air leakage to 0.3 cfm/sf maximum at 50 Pascals and I <br /> I All whole house ventilation requirements as determined by Section M1507.3 of the <br /> International Residential Code or Section 403.8 of the International Mechanical Code shall <br /> 2.1 I be met with a high efficiency fan(s)(maximum 0.35 watts/cfm), not interlocked with the f 0.5 <br /> furnace fan(if present).Ventilation systems using a furnace including an ECM motor are <br /> allowed,provided that they are controlled to operate at low speed in ventilation only <br /> mode. <br /> j To qualify to claim this credit,the building permit drawings shall specify the option being <br /> selected and the maximum tested building air leakage,and shall show the qualifying <br /> 'ventilation system and its control sequence of operation. <br /> Compliance based on Section R402.4.1.2:Reduce the tested air leakage to 2.0 air changes j <br /> per hour maximum at 50 Pascals or <br /> j <br /> j For R-2 Occupancies,optional compliance based on Section R402.4.1.2:Reduce the tested <br /> 2.2 air leakage to 0.25 cfm/sf maximum at 50 Pascals and 1.0 <br /> !All whole house ventilation requirements as determined by Section M1507.3 of the <br /> I j International Residential Code or Section 403.8 of the International Mechanical Code shall j <br /> 1 be met with a heat recovery ventilation system with minimum sensible heat recovery <br /> efficiency of 0.65.1 <br /> Compliance based on Section R402.4.1.2: I <br /> Reduce the tested air leakage to 1.5 air changes per hour maximum at 50 Pascals or <br /> j For R-2 Occupancies,optional compliance based on Section R402.4.1.2:Reduce the tested <br /> j 2.3 air leakage to 0.25 cfrn/sf maximum at 50 Pascals and j 1.5 <br /> All whole house ventilation requirements as determined by Section M1507.3 of the <br /> international Residential Code or Section 403.8 of the international Mechanical Code shall j <br /> j be met with a heat recovery ventilation system with minimum sensible heat recovery <br /> j efficiency of 0.75.1 <br /> Compliance based on Section R402.4.1.2: <br /> Reduce the tested air leakage to 0.6 air changes per hour maximum at 50 Pascals or <br /> 1 For R-2 Occupancies,optional compliance based on Section R402.4.1.2:Reduce the tested <br /> 2.4 air leakage to 0.15 cfm/sf maximum at 50 Pascals and 2.0 <br /> I !All whole house ventilation requirements as determined by Section M1507.3 of the 1 <br /> International Residential Code or Section 403.8 of the International Mechanical Code shall <br /> be met with a heat recovery ventilation system with minimum sensible heat recovery 1 I <br /> I efficiency of 0.80.Duct installation shall comply with Section R403.3.7. <br /> :1 To qualify to claim this credit,the'building.permit drawings shall specify the option being selected andshail <br /> specify the maximum tested building air leakage and shall show the heat recovery ventilation systerrf,jM':,:- <`:.'>;:;',...� <br /> Prescriptive Path—Single Family 2018 Washington State Energy Code-R 5 <br />